An OSX program to stitch together audiobook chapters into one continuous file?

Hey, I have downloaded a number of audiobooks to play via my iPod Classic in my car.

A known issue with the iPod Classic that hasn't been resolved, is the complete jumbling of chapters that happens when you load several books which have chapters divided into several sections. Rather than being collected by author (artist) and chapter (track) they're just jumbled nonsensically.

As the function for audiobooks has an 'auto-resume' function, actually there is little reason for me not to have each audiobook as one complete file, which would neaten things up. Unfortunately, most audiobooks seem to download in separate chapters.

So, I want to be able to arrange my audiobook chapters in sequence and stitch them back into one continuous file.

The only program I've found to do this so far is on http://dougscripts.com/itunes/ but, irritatingly, the order of tracks is frequently jumbled in the result - so it's useless.

Do you guys know of a free, or reasonably-priced program that can do this for me? I'm using a Mac - of course - and have access to the App Store.

Thanks guys, Audiobook Builder is indeed reasonably priced. It looks like a product which has been designed with care; and has two strong endorsements, so I'll buy it.

Looked at Playlists, but I want to use my book function as was intended!

Ok, this app is doing a great job of making the audiobooks..

But if I make one on my desktop, it seems there are two in my library by the time I drag it to my 'automatically add to iTunes folder'..

Then I delete the duplicate; and neither work!

Think it's squared now: Make the project file on your desktop or downloads folder (can delete afterwards); but select for the finished file to be placed in 'automatically add to iTunes'!